Abel,
This is what I bought from eBay:
http://cgi.ebay.com/ws/eBayISAPI.dll...24003&rd=1
A week later I ordered a second set. This seller always has them listed and you can easily get them for $19.99 plus $15 shipping. Just be the first bidder and if someone else bids on the same auction, bid on the next one. You can write to the seller about just buying a second receiver but it will cost you almost as much as bidding on another one. For the few dollars more I spent I figure it gives me a back up transmitter. Very good seller, by the way. Ships the day you PayPal.
The transmitter is light weight, comes with the battery installed, has a test button on top and two DIP switches on the bottom for changing the operating channel. The receiver is also very light, takes 2 AA batteries (make sure you use fresh ones) and has a convenient loop on top that I threaded a cell phone wrist strap through to hang it on a stand. You could probably also fix it to the side of your flash or stand with Velcro. The fit and finish is decent but the build was not designed for much abuse. I would expect one drop and you will be buying another one. These are not Pocket Wizards. In my opion, though, its worth $35. So far I have tested it at about 30' range (through house walls) and it fired without fail.
How do you plan on connecting these wireless triggers to your Canon flashes? The receiver has a 1/4" mono plug but the set comes with a 1/4"-to-1/8" adapter.
Greg